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Mark L. Horwitz

Founding Partner
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  • Profile
  • Credentials
  • Associations
  • Honors, Awards & Notable Cases

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Mark Horwitz is a founding member and partner of the Law Offices of Horwitz & Citro, P.A. Mark represents individuals and companies under criminal investigation or charged with crimes in federal courts throughout the country and in state courts throughout Florida. He also represents individuals and companies in related civil and administrative matters including federal grand jury investigations, civil fraud matters, IRS audits and seizures of currency, bank accounts and other property. Mr. Horwitz has represented individuals under investigation by Department of Justice attorneys in Washington, D.C. and various Assistant United States Attorneys throughout the country including Arizona, Florida, Illinois, New Jersey, New York, Texas, Georgia, California, Colorado and Minnesota. Mark’s goal is to protect our client’s liberty and property.

Mark Horwitz served as an Assistant United States Attorney in the Middle District of Florida for almost eight years. During that time, he prosecuted a wide variety of cases including criminal tax, healthcare fraud, drug trafficking, kidnapping, bombings, theft of government property, government contracting fraud, counterfeiting, mail fraud, wire fraud, and murder. While serving as an AUSA, Mark received a Certificate of Appreciation for his work with the Department of Treasury. In addition, Mark was designated an Honorary Special Agent of the Department of Treasury.

As a result of his experience representing the federal government in complex criminal cases, he developed an invaluable understanding of how the Department of Justice and federal law enforcement agencies work. This knowledge has been instrumental in successfully defending clients during government investigations and prosecutions. Mr. Horwitz uses his experience as a former federal prosecutor to conduct thorough defense investigations. In many instances, our defense investigations have resulted in the government's criminal investigation being closed without charges being filed against our clients.

Best Law Firm Susan Horwitz 2 American College of Trial Lawyers badge Martindale-Hubbell AV Preeminent badge Best Lawyers 2021

While in private practice, Mark Horwitz has defended clients being investigated for, or charged with crimes including:

  • Criminal tax violations
  • Healthcare fraud
  • Fraud against the government
  • Drug crimes
  • Securities fraud
  • Criminal and Civil RICO cases
  • Mortgage and bank fraud
  • Insurance fraud
  • Violations of U.S. munitions laws
  • Money laundering and currency violations
  • Wire and mail fraud

Mark Horwitz has also defended clients charged with various state crimes including murder, sex crimes, leaving the scene of accident with death, insurance fraud, healthcare fraud, and organized fraud in state courts throughout Florida.

Mark L. Horwitz

Mark Horwitz, a Harley-Davidson enthusiast, pictured here with partner, Vince Citro, before a Sunday morning motorcycle ride.

Certified Legal Specialties

Court Admissions

  • Member, Florida Bar - admitted to all Florida State courts
  • Member, Colorado Bar - admitted to all Colorado State courts

Admitted to the following federal courts:

  • Supreme Court of the United States
  • U.S. Court of Appeals District of Columbia
  • U.S. Court of Appeals Eleventh Circuit
  • U.S. Court of Appeals Federal Circuit
  • U.S. District Court Northern District of Illinois
  • U.S. District Court District of Columbia
  • U.S. District Court Northern District of Florida
  • U.S. District Court Southern District of Florida
  • U.S. District Court Middle District of Florida.
  • U.S. Court of Federal Claims
  • U.S. Tax Court


Mark Horwitz graduated from the University of Florida College of Business with High Honors majoring in economics. Upon receiving his bachelor’s degree, he was designated a Distinguished Military Graduate and commissioned as an officer in the U.S. Army. He served more than 8 years on active and reserve duty.

Mr. Horwitz graduated from the University of Florida College of Law with honors; he was on Law Review and a member of the Order of the Coif.

Past Employment Positions

  • United States Attorney's Office, Assistant U.S. Attorney, 1973 - 1980


  • Mark Horwitz has lectured on various topics including cross-examination, forfeiture, money laundering, and expert witnesses.
  • A cross-examination by Mr. Horwitz of a government witness was included in F. Lee Bailey’s book Criminal Trial Techniques Volume 3, Chapter 65E, published by Thomson West.
  • Various articles and blogs, posted by Mr. Horwitz, are available for review on the Horwitz & Citro, P.A. website.
  • Founding Attorney Horwitz Law

Honors and Awards

Mark Horwitz’s honors, awards, and professional achievements include:

  • Named “Lawyer of the Year” in 2020 Best Lawyers® in General Criminal Defense in Orlando
  • Listed in 2021 The Best Lawyers in America© for Criminal Defense: General and White-Collar 
  • AV Preeminent® rating from Martindale Hubbell
  • Listed in Florida Super Lawyers
  • Fellow in the American College of Trial Lawyers
  • Certified Criminal Trial Specialist by the Florida Bar Board of Certification
  • Certified by the National Board of Trial Advocacy as a Criminal Trial Specialist
  • Past President of the George C. Young American Inn of Court
  • Appointed by Chief U.S. District Judge of the Middle District of Florida to the Merit Selection Panel recommending candidates to succeed U.S. Magistrate Judge Thomas B. Smith
  • Appointed by the Chief U.S. District Judge of the Middle District of Florida to the Merit Selection Panel recommending candidates to succeed U.S. Magistrate Judge Karla R. Spaulding
  • Appointed panel member to the Ninth Judicial Circuit Court Local Professionalism Panel
  • Awarded the James G. Glazebrook Professionalism and Service Award by the George C. Young American Inn of Court
  • Served on the Florida Supreme Court Committee on Standard Jury Instructions in Criminal Cases. Attorneys and judges are appointed to this committee by the Supreme Court of the State of Florida. The committee is responsible for drafting standard jury instructions in criminal cases.